Changing the magnetic and optical properties of (Ga, Fe)N and (Ga, Co)N by alloying with oxygen
Source abstract
Abstract
Systematic density functional theory studies and model analyses have been used to show that the magnetic properties of (Ga0.94Fe0.06)N and (Ga0.94Co0.06)N can be changed from disorder local moment state to ferromagnetic state by replacing ~2 % of the nitrogen atoms with oxygen atoms. The estimated curie temperatures are much higher than the room temperature which indicates the room temperature ferromagnetism can be realized by oxygen doping. Moreover, the optical absorption spectra obtained by ab initio calculations confirm the ferromagnetic stability based on the charge state of magnetic impurities. (Ga0.94Fe0.06)N0.98O0.02 and (Ga0.94Co0.06)N0.98O0.02 ferromagnetic DMS exhibits half-metallic behavior, which is suitable for spintronics applications.
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Research context
OpenAlex topics: ZnO doping and properties · GaN-based semiconductor devices and materials · Semiconductor materials and devices
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